Heterogeneous fenton Oxidation 3 Catalysts 2 Citrus fruits 2 Nanostructured materials 2 Acid Orange II 1 Analysis of variance (ANOVA) 1 Azo dyes 1 Catalyst activity 1 Catalyst supports 1 Catalytic performance 1 Composite catalysts 1 Decolorization 1 Degradation 1 Degradation kinetics 1 Dye pollutants 1 Experimental values 1 Fenton process 1 Fenton-like reactions 1 First order reactions 1 Heterogeneous Fenton-like catalysts 1 High catalytic performance 1 Iron 1 Iron compounds 1 Iron oxides 1 Iron waste 1 Its efficiencies 1 Kinetics 1 Low cost catalysts 1 Magnetite 1